Gene Regulation Welcome to your Gene regulation question series Which of the following is true about CRP-cAMP in lac operon regulation CRP-cAMP is a positive regulator of responsive to lactose CRP-cAMP is a negative regulator of responsive to lactose CRP-cAMP is a positive regulator of responsive to glucose I&III None What are riboswitches Cis regulatory factors RNA structures I&II A GC rich sequence None DNA binding proteins rarely to bind at minor groove True False None Which type gene regulation is present in the bacteria Modification of histones Chromatin remodelling Operon based All of the above None Operator sequences are DNA polymerase binding site Transcription inducer proteins Repressor binding sites None of the above None Where is the attenuator sequence is located in trp operon, 3’end of trp operon mRNA In the leader region 500 bp downstream promoter Ribosomal binding site of last gene None How does lactose promotes the expression of lac operon By inhibiting the expression of the glycolytic genes By binding to the promoter of the lac operon By binding to the lac repressor Inducing expression of gene I None Which of the following is true for genes in the operon Each gene has an independent promoter Each gene has its own ribosome binding site All the genes need separate activation All of the above None Promoter of a gene is required for Transcription termination Transcription initiation Binding of DNA polymerase to the DNA Splicing site None In the absence of the lactose genes of lac operon are Activated Induced Repressed Constitutively expressed None Choose the correct sequence of the events as per the progression of the expression of the lac operon. A. Expression of I geneB. Expression of lac operonC. Binding of lactose to the repressorD.Binding of lac repressor to the operator of lac operon ABCD BCAD ADCB ADBC None Which of the following is not true about operon Genes are clustered on the chromosome May produce polycistronic RNAs Can be operated by a single promoter Each gene of the operon is regulated independent promoter None Time's up
